No. 639] INHFAUTANCE OF BLUE IN POULTRY 295 



ing tlie cliarac'teristics of tlu'ii- res] x'cl Nni'ictics with 

 constancy in so far as could hv Icai-iit'd. In as nuich as 

 only varietal (color), as o])]:)os('d to hrccd (sliai)t>) char- 

 acteristics were being- studied, h'ss attention was i)aid to 

 the latter in selecting material. In no case, liowever, 

 were individuals used which sliowed disqnalifyinir breed 



AVitli a sin-le cxcH-ption no indlvi,lual wa> ix>..\ whose 

 genolypo ])rovod to be in('onsi>lrnt witli \\w -br.MMlin- 

 true" of the variety to which it bch-niivd. or. in thr ca-e 

 of the blue-plashi'd Anr la hi^ia n. tin' Ifon. NNhirh 



it aro^e. This sin-lo .Ar.pti.m N\a^ a bin. ^pla^ln d 

 Andalusian female ( L' 107 ) pnrehas..d l ioin a bivd.')- who 



heterozygous for P, a factor neeessai'v foi- the i)roduction 

 of black ])igment. The famil\- fr.nn which slu' arose 



in all lik.'lih.)od.V..inu' (liM-anlr.l a^ c\tr. iu.^In liuhl bln.- 

 s])la^h-d NNaM..,- fn.ni th.^ bine bin.- matinu^. Tai^ 



similar lo this one that white varieties have br.en estab- 

 lished in x'V.Tal br.MMls. 



Th.Mv uen. M.N..|-al imliNldnaN diM-o\ .Te.! nvIu.m^ fac- 

 torial c.nnpoMth.n xaii.Ml ir.nn tln^ n-omal. o,- n^ial. for 

 th.. Narieti..t..vNhirhthe> re.p,.c, i n .■!> ImLmil:..!. Ovvin- 

 to tho parti. -nlar lactorial coni]>l.A ol which tlnw w..,e a 



affeJtin- the adult pla'aotvp* ol the xari.'ty. Sp.eitie 



